Spice model behavior for ADA4930

Hi Rleduc ,

Good day. Can you share with us your schematic diagram? I have tried it using a certain configuration and the output does not clip in this circuit:

Regards,
Gilbeys

Hi Gilbeys,

My bad I really thought I shared the schematic, here it is :

I believe the /SHDN should be set high in order to enable the aop, that is why you got a voltage amplitude much smaller while the gain is set to 1.

Can you try again to see if the output is clipped ? I suppose this might be due to model inaccuracy because I don't see why negative voltage wouldn't be allowed !

Regards,

Hi Rleduc ,

Good day. I was verifying the model in the LTSpice and it seems that there was an inaccuracy with it. You can try to use the model of ADA4930 which is available in the ADA4930-1 webpage (https://www.analog.com/en/products/ada4930-1.html). I tried to verify the circuit using this model and it works fine:

With regards to the model found on LTSpice, I'll try to coordinate it with the team. Hope this helps.

Regards,
Gilbeys

Hey,

This makes more sense, thank you very much I will do so !

Regards,

Hi Gilbeys,

I am facing issues in simulating ADA4930-1 in a differential amplifier configuration. As suggested by you in this thread, I tried using the AD4930 model as well but the pin definitions are quite weird for that one also the results were not as expected. Could you please provide proper spice model for simulation.

Thanks in advance.

Regards,

Kritika

Hi KritikaYadav ,

Can you share to me your pin definitions? Thank you.

Regards,
Gilbeys